package/kernel/mac80211/patches/subsys/312-mac80211-minstrel_ht-fix-default-max-throughput-rate.patch

   1 From: Felix Fietkau <nbd@nbd.name>
   2 Date: Fri, 14 Jun 2019 21:14:22 +0200
   3 Subject: [PATCH] mac80211: minstrel_ht: fix default max throughput rate
   4  indexes
   5
   6 Use the first supported rate instead of 0 (which can be invalid)
   7
   8 Signed-off-by: Felix Fietkau <nbd@nbd.name>
   9 ---
  10
  11 --- a/net/mac80211/rc80211_minstrel_ht.c
  12 +++ b/net/mac80211/rc80211_minstrel_ht.c
  13 @@ -486,7 +486,7 @@ minstrel_ht_assign_best_tp_rates(struct
  14         tmp_prob = mi->groups[tmp_group].rates[tmp_idx].prob_ewma;
  15         tmp_mcs_tp = minstrel_ht_get_tp_avg(mi, tmp_group, tmp_idx, tmp_prob);
  16
  17 -       if (tmp_cck_tp > tmp_mcs_tp) {
  18 +       if (tmp_cck_tp_rate && tmp_cck_tp > tmp_mcs_tp) {
  19                 for(i = 0; i < MAX_THR_RATES; i++) {
  20                         minstrel_ht_sort_best_tp_rates(mi, tmp_cck_tp_rate[i],
  21                                                        tmp_mcs_tp_rate);
  22 @@ -558,11 +558,19 @@ minstrel_ht_update_stats(struct minstrel
  23         mi->sample_slow = 0;
  24         mi->sample_count = 0;
  25
  26 -       /* Initialize global rate indexes */
  27 -       for(j = 0; j < MAX_THR_RATES; j++){
  28 -               tmp_mcs_tp_rate[j] = 0;
  29 -               tmp_cck_tp_rate[j] = 0;
  30 -       }
  31 +       memset(tmp_mcs_tp_rate, 0, sizeof(tmp_mcs_tp_rate));
  32 +       memset(tmp_cck_tp_rate, 0, sizeof(tmp_cck_tp_rate));
  33 +       if (mi->supported[MINSTREL_CCK_GROUP])
  34 +               for (j = 0; j < ARRAY_SIZE(tmp_cck_tp_rate); j++)
  35 +                       tmp_cck_tp_rate[j] = MINSTREL_CCK_GROUP * MCS_GROUP_RATES;
  36 +
  37 +       if (mi->supported[MINSTREL_VHT_GROUP_0])
  38 +               index = MINSTREL_VHT_GROUP_0 * MCS_GROUP_RATES;
  39 +       else
  40 +               index = MINSTREL_HT_GROUP_0 * MCS_GROUP_RATES;
  41 +
  42 +       for (j = 0; j < ARRAY_SIZE(tmp_mcs_tp_rate); j++)
  43 +               tmp_mcs_tp_rate[j] = index;
  44
  45         /* Find best rate sets within all MCS groups*/
  46         for (group = 0; group < ARRAY_SIZE(minstrel_mcs_groups); group++) {